747fan From United States of America, joined Jun 2007, 1172 posts, RR: 1 Reply 1, posted (6 years 3 months 1 week 1 day 20 hours ago) and read 2392 times:
I like both the IAE V2500 and CFM56, but I slightly prefer the IAE V2500. Although the V2500 is a newer design, which gives it several benefits over the CFM56 - slightly quieter and slightly lower fuel burn (2-spool compressor, I believe, which makes it more suitable to transcons in terms of fuel burn than the CFM). The IAE also has wide-chord fan blades, which are a bit more efficient and fare better against bird strikes. In terms of sound, both sound relatively similar with a few differences. The CFM56, well we all know how they sound with their distinctive fan growl on takeoff. The V2500 sort of sounds like a mix of the CFM56 and RB211-535E4, with the CFM's fan growl and the compressor whine of the RB211.
747fan From United States of America, joined Jun 2007, 1172 posts, RR: 1 Reply 2, posted (6 years 3 months 1 week 1 day 20 hours ago) and read 2390 times:
Quoting 747fan (Reply 1): 2-spool compressor, I believe, which makes it more suitable to transcons in terms of fuel burn than the CFM)
Correction: I meant 2-stage high pressure turbine, which allows the HPC compressor to do more work, translating into slightly better fuel efficiency (about a 2% fuel burn advantage for the V2500). Overall, the IAE's are the better suited for "longer haul routes" (transcons - think B6), while CFM's are the better engines for short hops (think WN w/ their 737's, US w/ their A319 east coast shuttle). One other IAE advantage is that it burns less oil than the CFM. An advantage for the CFM is reliability - I don't know about the IAE's reliability track record, but the CFM56 is among the most reliable and durable jet engines ever built (along w/ the JT8D), hence its popularity and 25-year service run (so far), with it still using the same design.
CV990 From , joined Dec 1969, posts, RR: Reply 8, posted (6 years 3 months 1 week 10 hours ago) and read 2331 times:
I always looked to the IAE V2500 has a "small" RRoyce engine! The design of the nacelle is clean and elegant and from kind of unknown reason I prefer the Airbuses with those engines against the ones with CFM's....I had the chance to fly all Airbus narrow body models with IAE engines ( A319 from HP, A320 from Air Macau and A321 from BA ).